A sterile artificial substitute for a blood vessel intended to replace or bypass the diseased or injured vessel. It is typically made of woven or knitted polyethylene terephthalate (Dacron) or polytetrafluoroethylene (PTFE) fabrics and is best suited for large (more than 10 mm) diameter, high-flow vessel replacement (e.g., aortic or aorto-iliac artery reconstruction) and also for haemodialysis access and extra-anatomic bypass grafting. The device is used in many vascular bypass procedures (e.g., aorto-iliac, femoral-popliteal, axillo-axillary artery) except those involving the coronary arteries.